Wi-Fi module introduction--TYJW2.1

Product Overview

​ TYJW2.1 is a Wi-Fi module, developed by Hangzhou Tuya Information Technology Co., Ltd., for serial port communication at the level of 5V TTL. It mainly consists of a highly integrated wireless RF chip ESP8266EX and external flash chip, with the built-in Wi-Fi network protocol stack and rich library functions. TYJW2.1 also contains a 32-bit CPU of low power consumption, 1Mbyte flash and 36K SRAM.

​ TYJW2.1 is also an RTOS platform integrating all Wi-Fi MACs and TCP/IP protocol libraries. The user can develop embedded Wi-Fi products that meet their needs, based on serial communication.

​ The structure of TYJW2.1 is shown in Figure 1:

1.1 Features

• Built-in 32-bit CPU of low power consumption, also used as an application processor.

​ Main frequency: 80MHz and 160MHz

• Operating voltage: 4.5V-5.5V
• Peripheral: 1×UART (level: 5V TTL)
• Wi-Fi connectivity

​ 802.11 b/g/n

​ Channel 1-14@2.4GHz

​ Support the WPA/WPA2 security mode.

​ Output power: maximum +20dBm in the 802.11b mode.

​ Support the STA/AP/STA+AP mode.

​ Support the SmartConfig function (including Android and IOS devices).

​ IPEX connector between the onboard PCB antenna and external antenna.

​ Operating temperature: -20℃ to 85℃

1.2 Main Applications

• Smart buildings
• Smart home/household appliances
• Healthcare
• Industrial wireless control
• Handheld devices

Module Interface

Size and Package

Electrical interface of TYJW2.1: PH-4AW connector, with the pin spacing of 2.0mm.

Size of TYJW2.1: 49.6 mm (W)×31 mm (L) ×9.1 mm (H). Refer to Figure 2 for its package.

Pin Definitions

The interface pins are defined in Table 1.

​ Table 1: Layout of TYJW2.1 Interface Pins

Pin	Symbol	IO Type	Function
1	RX	I/O	RX communication port of the module, with the input level of 5V TTL
2	TX	I/O	TX communication port of the module, with the input level of 5V TTL
3	GND	P	Reference ground pin of the power supply of module
4	VCC	P	Input pin of the 5V power supply of module

Note: P is the power pin, and I/O is the input/output pin.

Test Pin Definitions

Test pins are defined in Table 2.

​ Table 2: Layout of TYJW2.1 Test Pins

Pin	Symbol	IO Type	Function
5	3.3V	P	Pin of the internal 3.3V power supply of module
6	GND	P	Referent ground pin of the power supply of module
7	BOOT	I/O	IO0 pin, for module firmware programming
8	TXD1	I/O	Module information printing port
9	RXD0	I/O	Module firmware programming port
10	TXD0	I/O	Module firmware programming port
11	RST	I/O	Module hardware resetting pin

Notes: P is the power pin, and I/O is the input/output pin.

When the IO0 is null, the module runs normally; and when IO0 is at the low level, the module is in the status of firmware programming.

RST is used for module hardware resetting only, but not for clearing Wi-Fi network information.

Test pins are not recommended.

Electrical Parameters

Absolute Electrical Parameters

​ Table 3: Absolute Parameters

Parameter	Description	Min.	Max.	Unit
Ts	Storage temperature	-20	85	℃
VCC	Power supply voltage	-0.3	5.5	V
Electrostatic discharge voltage (human body model)	TAMB-25℃	-	2	KV
Electrostatic discharge voltage (machine model)	TAMB-25℃	-	0.5	KV

Operating Conditions

​ Table 4: Normal Operating Conditions

Parameter	Description	Min.	Typical	Max.	Unit
Ta	Ambient temperature	-20	-	85	℃
VCC	Operating voltage	4.5	5	5.5	V
VIL	IO low-level input	-0.3	-	VCC*0.25	V
VIH	IO high-level input	VCC*0.75	-	VCC	V
VOL	IO low-level output	-	-	VCC*0.1	V
VoH	IO high-level output	VCC*0.8	-	VCC	V
Imax	IO drive current	-	-	5	mA

Power Consumption for Wi-Fi Transmission

​ Table 5: Power Consumption of Continuous TX Transmission

Symbol	Mode	Rate	Typical	Unit
IRF	11b	11Mbps	260	mA
IRF	11g	54Mbps	100	mA
IRF	11n	MCS7	100	mA

Power Consumption for Wi-Fi Reception

​ Table 6: Power Consumption of Continuous RX Reception

Symbol	Mode	Rate	Typical	Unit
IRF	11b	11Mbps	70	mA
IRF	11g	54Mbps	70	mA
IRF	11n	MCS7	70	mA

Power Consumption in Operating Mode

​ Table 7: Operating Current of TYJW2.1

Operating Mode	**Operating Status (**Ta=25℃)	Average	Maximum	Unit
Fast connection networking status	The module is in the status of fast connection networking, with the Wi-Fi indicator flickering fast.	90	151	mA
Hotspot networking status	The module is in the status of hotspot networking, with the Wi-Fi indicator flickering slowly.	101	451	mA
Network connection status	The module is connected with the Internet, with the Wi-Fi indicator normally ON.	58.5	411	mA
Network disconnection status	The module is disconnected from the Internet, with the Wi-Fi indicator normally OFF.	156	430	mA

RF Characteristics

Basic RF Characteristics

​ Table 8: Basic RF Characteristics

Parameter	Detailed Description
Operating frequency	2.400-2.500GHz
Wi-Fi standard	IEEE 802.11b/g/n (Channel 1-14)
Data transmission rate	11b:1,2,5.5, 11 (Mbps)11g:6,9,12,18,24,36,48,54(Mbps)11n:HT20 MCS0~7
Antenna type	PCB antenna (default)U.FL RF connector: external antenna (optional)

Wi-Fi Output Power

​ Table 9: Continuous Transmitting Power of TX

Parameters		Min.	Typical	Max.	Unit
RF average output power, 802.11b CCK Mode	1M	-	20	-	dBm
RF average output power, 802.11g OFDM Mode	54M	-	17	-	dBm
RF average output power, 802.11n OFDM Mode	MCS7	-	14	-	dBm
Frequency error		-10	-	10	ppm

Wi-Fi Receiving Sensitivity

​ Table 10: RX Sensitivity

Parameter		Min.	Typical	Max.	Unit
RX sensitivity at PER<8%, 802.11b CCK Mode	1M	-	-91	-	dBm
RX sensitivity at PER<10%, 802.11g OFDM Mode	54M	-	-75	-	dBm
RX sensitivity at PER<10%, 802.11n OFDM Mode	MCS7	-	-72	-	dBm

Antenna Information

Antenna Type

Two kinds of antenna are applicable: PCB board antenna and external antenna, the former of which is applied in the default mode. For the use of the external antenna, contact our sales staff.

Reduction of Antenna Interference

When the PCB board antenna is used in the Wi-Fi module, it is recommended to keep the module antenna at least 15mm away from other metal parts, in order to optimize the Wi-Fi performance.

U.FL RF Connector

​ The parameters of the U.FL RF connector are shown below.

Packaging Information and Production Guide

Mechanical Dimensions

Production Guide

Module storage conditions:

1. The moisture-proof bag must be stored in the environment with the temperature below 30℃ and the relative humidity less than 85%.
2. The warranty period of the product in the dry package should be six months from the date of packaging.

Notes:

1. All operators must wear the electrostatic ring during production.
2. The module must be prevented from water or dirt during operation.